Journal
CARBOHYDRATE POLYMERS
Volume 213, Issue -, Pages 39-49Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2019.02.067
Keywords
High-gravity technology; Carboxymethyl cellulose; Fe3O4 nanoparticles; Removal; Heavy metal ions
Categories
Funding
- Natural Science Foundation for Young Scientists of Shanxi Province of China [201801D221144]
- Shanxi Province Key Laboratory of Functional Nanocomposites research for the Open fund [NFCM201702]
- School Science Foundation of North University of China [2017016]
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The aim of this study is to explore facile and large-scale method for the preparation of magnetic adsorbent materials with high-efficient heavy metal removal performance. Here, based on the process intensification of high-gravity technology, the carboxymethyl cellulose-immobilized Fe3O4 nanoparticles (CMC-Fe3O4) were continuously synthesized via impinging stream-rotating packed bed. With a theoretical production rate of 2.35 kg h(-1), the as-prepared CMC-Fe3O4 exhibited better adsorption capacity and faster rate for Pb(II) than those of pure Fe3O4, and the maximum adsorption capacity of Pb(II) reached up to 152.0 mg g(-1). It was found that the adsorption data of Pb(II) onto CMC-Fe3O4 fit well to pseudo-second order kinetic model and Langmuir isotherm model. Moreover, the as-prepared adsorbent exhibited good reusability after five adsorption-desorption cycles. Overall, the high-gravity technology can be employed for the preparation of high-performance nanoadsorbent and has a great potential in the application of heavy metal removal.
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